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dvb_frontend.h

/*
 * dvb_frontend.h
 *
 * Copyright (C) 2001 convergence integrated media GmbH
 * Copyright (C) 2004 convergence GmbH
 *
 * Written by Ralph Metzler
 * Overhauled by Holger Waechtler
 * Kernel I2C stuff by Michael Hunold <hunold@convergence.de>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *

 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

#ifndef _DVB_FRONTEND_H_
#define _DVB_FRONTEND_H_

#include <linux/types.h>
#include <linux/sched.h>
#include <linux/ioctl.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/mutex.h>

#include <linux/dvb/frontend.h>

#include "dvbdev.h"

struct dvb_frontend_tune_settings {
      int min_delay_ms;
      int step_size;
      int max_drift;
      struct dvb_frontend_parameters parameters;
};

struct dvb_frontend;

struct dvb_tuner_info {
      char name[128];

      u32 frequency_min;
      u32 frequency_max;
      u32 frequency_step;

      u32 bandwidth_min;
      u32 bandwidth_max;
      u32 bandwidth_step;
};

struct analog_parameters {
      unsigned int frequency;
      unsigned int mode;
      unsigned int audmode;
      u64 std;
};

struct dvb_tuner_ops {

      struct dvb_tuner_info info;

      int (*release)(struct dvb_frontend *fe);
      int (*init)(struct dvb_frontend *fe);
      int (*sleep)(struct dvb_frontend *fe);

      /** This is for simple PLLs - set all parameters in one go. */
      int (*set_params)(struct dvb_frontend *fe, struct dvb_frontend_parameters *p);
      int (*set_analog_params)(struct dvb_frontend *fe, struct analog_parameters *p);

      /** This is support for demods like the mt352 - fills out the supplied buffer with what to write. */
      int (*calc_regs)(struct dvb_frontend *fe, struct dvb_frontend_parameters *p, u8 *buf, int buf_len);

      int (*get_frequency)(struct dvb_frontend *fe, u32 *frequency);
      int (*get_bandwidth)(struct dvb_frontend *fe, u32 *bandwidth);

#define TUNER_STATUS_LOCKED 1
#define TUNER_STATUS_STEREO 2
      int (*get_status)(struct dvb_frontend *fe, u32 *status);
      int (*get_rf_strength)(struct dvb_frontend *fe, u16 *strength);

      /** These are provided seperately from set_params in order to facilitate silicon
       * tuners which require sophisticated tuning loops, controlling each parameter seperately. */
      int (*set_frequency)(struct dvb_frontend *fe, u32 frequency);
      int (*set_bandwidth)(struct dvb_frontend *fe, u32 bandwidth);
};

struct dvb_frontend_ops {

      struct dvb_frontend_info info;

      void (*release)(struct dvb_frontend* fe);
      void (*release_sec)(struct dvb_frontend* fe);

      int (*init)(struct dvb_frontend* fe);
      int (*sleep)(struct dvb_frontend* fe);

      int (*write)(struct dvb_frontend* fe, u8* buf, int len);

      /* if this is set, it overrides the default swzigzag */
      int (*tune)(struct dvb_frontend* fe,
                struct dvb_frontend_parameters* params,
                unsigned int mode_flags,
                unsigned int *delay,
                fe_status_t *status);
      /* get frontend tuning algorithm from the module */
      int (*get_frontend_algo)(struct dvb_frontend *fe);

      /* these two are only used for the swzigzag code */
      int (*set_frontend)(struct dvb_frontend* fe, struct dvb_frontend_parameters* params);
      int (*get_tune_settings)(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* settings);

      int (*get_frontend)(struct dvb_frontend* fe, struct dvb_frontend_parameters* params);

      int (*read_status)(struct dvb_frontend* fe, fe_status_t* status);
      int (*read_ber)(struct dvb_frontend* fe, u32* ber);
      int (*read_signal_strength)(struct dvb_frontend* fe, u16* strength);
      int (*read_snr)(struct dvb_frontend* fe, u16* snr);
      int (*read_ucblocks)(struct dvb_frontend* fe, u32* ucblocks);

      int (*diseqc_reset_overload)(struct dvb_frontend* fe);
      int (*diseqc_send_master_cmd)(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd);
      int (*diseqc_recv_slave_reply)(struct dvb_frontend* fe, struct dvb_diseqc_slave_reply* reply);
      int (*diseqc_send_burst)(struct dvb_frontend* fe, fe_sec_mini_cmd_t minicmd);
      int (*set_tone)(struct dvb_frontend* fe, fe_sec_tone_mode_t tone);
      int (*set_voltage)(struct dvb_frontend* fe, fe_sec_voltage_t voltage);
      int (*enable_high_lnb_voltage)(struct dvb_frontend* fe, long arg);
      int (*dishnetwork_send_legacy_command)(struct dvb_frontend* fe, unsigned long cmd);
      int (*i2c_gate_ctrl)(struct dvb_frontend* fe, int enable);
      int (*ts_bus_ctrl)(struct dvb_frontend* fe, int acquire);

      struct dvb_tuner_ops tuner_ops;
};

#define MAX_EVENT 8

struct dvb_fe_events {
      struct dvb_frontend_event events[MAX_EVENT];
      int                 eventw;
      int                 eventr;
      int                 overflow;
      wait_queue_head_t   wait_queue;
      struct mutex              mtx;
};

struct dvb_frontend {
      struct dvb_frontend_ops ops;
      struct dvb_adapter *dvb;
      void* demodulator_priv;
      void* tuner_priv;
      void* frontend_priv;
      void* sec_priv;
};

extern int dvb_register_frontend(struct dvb_adapter* dvb,
                         struct dvb_frontend* fe);

extern int dvb_unregister_frontend(struct dvb_frontend* fe);

extern void dvb_frontend_detach(struct dvb_frontend* fe);

extern void dvb_frontend_reinitialise(struct dvb_frontend *fe);

extern void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec);
extern s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime);

#endif

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